Except for the beds, Sweden’s Ice Hotel is made completely of ice blocks — 60 rooms and suites, a bar, a reception area and a chapel, 30,000 square feet in all. Even the glasses in the bar are made of ice. You can book a room for about $400, but hurry — it melts in May.

Its alter ego is the Uyuni Salt Hotel, in Bolivia, where everything — including the beds — is made of salt. (Photo (c)2005 Tom Corser, www.tomcorser.com.)